2024八年级下·全国·专题练习
1 . 在平面直角坐标系中,一次函数
的图象为直线
,在下列结论中:
①无论
取何值,直线
一定经过某个定点;
②过点
作
,垂足为
,则
的最大值是
;
③若
与
轴交于点
,与
轴交于点
,
为等腰三角形,则
;
④对于一次函数
,无论
取何值,始终有
,则
,
或
.
其中正确的是___ .(填写所有正确结论的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94ededd378c4858bb86c458a17d2f50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
①无论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
②过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf59107b1cb4f2c9dc9f27525311e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
④对于一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ae8cc2866afcc5a3d0b1250a3043cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8749eff2070fdbb481582643bc606c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6aeba88a67720f9b5a83a25701dc5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7114eb2305af5e5d426db9ece3fbbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fffd554e0d91dd05b89937685fea98e9.png)
其中正确的是
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2 . 定义:(ⅰ)如果两个函数
,
,存在
取同一个值,使得
,那么称
,
为“合作函数”.称对应
的值为
,
的“合作点”:(ⅱ)如果两个函数为
,
为“合作函数”,那么
的最大值称为
,
的“共赢值”.
(1)判断函数
与
是否为“合作函数”,如果是,请求出合作点;如果不是,请说明理由;
(2)已知函数
与
是“合作函数”,且有唯一合作点.
①求出
的取值范围;
②若它们的“共赢值”为18,试求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1292c47f62023b747f1a4bd615c75284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d6e75677951ef1388f76aee5a779149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380d49944de666621e7fc7cc34ce4d95.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0c59c253d17c5f88d3b69ae4caa81c.png)
①求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②若它们的“共赢值”为18,试求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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3 . 已知一次函数
.
(1)若点
在
的图象上,求
的值;
(2)当
时,若函数的最大值3,求
的函数表达式;
(3)对于一次函数
,若对一切实数x,
都成立,求k、a满足的数量关系及k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/125d81cf2ca74f9dfcbe70a1a034a7b6.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a20a61d384b658080b92d8c1a9e7c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a5377bf82396cdd7f37d98f8da003ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(3)对于一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/182531e99c851fcb6a9008bc74685c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
您最近一年使用:0次
2023-09-07更新
|
203次组卷
|
6卷引用:福建省漳州市漳浦县2022-2023学年八年级下学期期中数学试题
福建省漳州市漳浦县2022-2023学年八年级下学期期中数学试题(已下线)专题12.8 一次函数章末九大题型总结(培优篇)-2023-2024学年八年级数学上册举一反三系列(沪科版)(已下线)专题4.8 一次函数章末九大题型总结(培优篇)-2023-2024学年八年级数学上册举一反三系列(北师大版)(已下线)专题6.8 一次函数章末九大题型总结(培优篇)-2023-2024学年八年级数学上册举一反三系列(苏科版)(已下线)专题5.8 一次函数章末九大题型总结(培优篇)-2023-2024学年八年级数学上册举一反三系列(浙教版)(已下线)专题2.11 一元一次不等式与一次函数(知识梳理与考点分类讲解)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)
4 . 小云同学根据函数的学习经验,对函数
进行探究,在如图所示的平面直角坐标系中已画出函数
在
时的图象,且已知:当
时,函数
的图象经过点
和
.
(1)请你根据已知条件,在平面直角坐标系中,画出当
时函数
的图象;
(2)观察函数
的图象,下列关于函数
的三个性质描述正确的有:________;(填写序号)
①当
时,
随
的增大而增大;
②当
时,
随
的增大而减小;
③当
时,函数
取到最大值为4.
(3)若函数
的图象与函数
的图象有交点,求出常数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d102731308892eba81f569fff5cf9077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07468e723520c9ad690a8472d0529b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a7e4dcebd24c843379926de9c0b780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/01ad98b4-29d8-49a0-aa2d-56a506dfffc1.png?resizew=387)
(1)请你根据已知条件,在平面直角坐标系中,画出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a7e4dcebd24c843379926de9c0b780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(2)观察函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07468e723520c9ad690a8472d0529b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a7e4dcebd24c843379926de9c0b780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/003eaa8cf3294352258fbe2c9ba3a5cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
5 . 小颖根据学习函数的经验,对函数
的图象与性质进行了探究,下面是小颖的探究过程,请你补充完整.
(1)列表:
①
______;
②若
,
为该函数图象上不同的两点,则
______.
(2)描点并画出该函数的图象.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/53a153c2-5ef9-4e72-a99a-aadca2e81403.png?resizew=205)
(3)根据函数图象可得:
①该函数的最大值为______;
②观察函数
的图象,写出该图象的两条性质:______,______;
③已知直线
与函数
的图象相交,则当
时x的取值范围是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ca0e6176c0d1e15f0122b76509d200.png)
(1)列表:
![]() | … | ![]() | ![]() | 0 | 1 | 2 | 3 | 4 | … |
![]() | … | ![]() | ![]() | 0 | 1 | 0 | ![]() | ![]() | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48de11dd5e00ad309983d9888fa6656b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954b77c5aecc4899e79796ff4d6abe6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
(2)描点并画出该函数的图象.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/53a153c2-5ef9-4e72-a99a-aadca2e81403.png?resizew=205)
(3)根据函数图象可得:
①该函数的最大值为______;
②观察函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ca0e6176c0d1e15f0122b76509d200.png)
③已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74582758d327ad4bf6950a6a2b31ecf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ca0e6176c0d1e15f0122b76509d200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aecb3141fb70a2a6f537d9fa5b40ef4.png)
您最近一年使用:0次
2023-04-03更新
|
257次组卷
|
5卷引用:河南省郑州市第九十六中学2022-2023学年八年级上学期期中数学试题
河南省郑州市第九十六中学2022-2023学年八年级上学期期中数学试题(已下线)专题41 含绝对值的一次函数-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(人教版)(已下线)难点特训(二)和一元一次不等式(组)有关的压轴题-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(北师大版)(已下线)第19章 一次函数 单元综合检测(难点题型专训)-2022-2023学年八年级数学下册同步精品课堂(人教版)(已下线)19.2.3 一次函数与方程、不等式(题型专训)-2022-2023学年八年级数学下册同步精品课堂(人教版)
6 . 问题探究:同学们在学习了函数、方程与不等式的关系后,某学习小组同学想要研究不等式组
的解集,请按照该组同学的探究思路完成以下问题:
首先令
,再通过列表、描点、连线的方法作出该函数的图像并对其性质进行了探究.
如表y与x的几组对应值:
的图像,当y随x的增大而减小时,x的取值范围是__________;
(2)若
,
为该函数图像上不同的两点,则
;
(3)当
时,自变量x的取值范围是 ;
(4)定义
,例如
,
,则函数
的最大值为_________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4809e86d1af31576a649258ae9708e10.png)
首先令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9022b3128e5c0322ba082a97901e2726.png)
如表y与x的几组对应值:
x | … | ![]() | ![]() | ![]() | ![]() | 0 | 1 | 2 | 3 | 4 | … |
y | … | ![]() | ![]() | 1 | 3 | 5 | 3 | 1 | ![]() | ![]() | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9022b3128e5c0322ba082a97901e2726.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b501f0ddaee1e0bebc784c88dc40ed9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9158b11e12bd095b9b5150e3df8e0f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4809e86d1af31576a649258ae9708e10.png)
(4)定义
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a1cc65471efeb9359920b42d1bd2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c05ee3016d6c1402607480162c591336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9aa44ab1e6084e9b65a9d62b613efe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/974ea1008efa313eaff954c79a92d82f.png)
您最近一年使用:0次
2023-04-28更新
|
369次组卷
|
4卷引用:广东省深圳市宝安区2022-2023学年八年级下学期期中考试数学试卷
名校
7 . 小颖根据学习函数的经验,对函数
的图像与性质进行了探究下面是小颖的探究过程,请你补充完整
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/b9fb2981-927d-4c4a-90b6-7297f3167bfd.png?resizew=228)
(1)列表:
①
______ ;
②若
,
为该函数图像上不同的两点,则
______ ;
(2)描点并画出该函数的图像;
(3)①根据函数图像可得:该函数的最大值为______ ;
②写出函数图像的两条性质:______ ;
③若方程
有两个实数解,求
的取值范围:______ ;
④当
时
的取值范围是______ ;
⑤将
沿
轴至少平移______ 个单位长度,能使
与
的函数图像无交点?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ca0e6176c0d1e15f0122b76509d200.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/b9fb2981-927d-4c4a-90b6-7297f3167bfd.png?resizew=228)
(1)列表:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5690370b85096d9c58d3bd9f1a20f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672025e74cd848b471299dc1df55fd88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
(2)描点并画出该函数的图像;
(3)①根据函数图像可得:该函数的最大值为______ ;
②写出函数图像的两条性质:______ ;
③若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e8ba76dc33a783d58c17e8c4d484b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6afa7e3830c76bfdefa6eca80ff411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
⑤将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74582758d327ad4bf6950a6a2b31ecf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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8 . 定义符号
的含义为:当
时,
;当
时,
.如:
,
.已知一种关于x的新函数
,且
,则关于y的函数下面说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6323f3d42a8c329f1231a4183cca21c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1132de2e8913dba9c5cc2396ecb09fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d4e40d8a516cfac555fd238041a8a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb877714a572222f19758923620208c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946666e6367a163f77002a8d3dda967e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6b0b86b8b5d79c6731fab3b9acce0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b13b6f5c04b5688982cc709c1ad18ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc3eb2b0592ef2352237c35fdb50cd7.png)
A.若![]() ![]() ![]() ![]() |
B.当函数图象经过![]() ![]() |
C.![]() ![]() ![]() |
D.当![]() |
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9 . 小颖根据学习函数的经验,对函数
的图象与性质进行了探究,下面是小颍的探究过程,请你补充完整.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/1e4981c3-35f7-411e-bb54-ea5d5cdfb8a1.png?resizew=221)
(1)列表:
①
__________;
②若
为该函数图象上不同的两点,则
___________;
(2)描点并画出该函数的图象.
(3)根据函数图象可得:该的数的最大值为_____________;观察函数
的图象,写出该图象的一条性质:_____________________;
(4)已知直线
与函数
的图象相交,则当
时x的取值范围是__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f21cb1a6bcc6e2482c420ddebeb9853e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/1e4981c3-35f7-411e-bb54-ea5d5cdfb8a1.png?resizew=221)
(1)列表:
x | … | ![]() | ![]() | 0 | 1 | 2 | 3 | 4 | … |
y | … | ![]() | ![]() | 0 | 1 | 0 | ![]() | k | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf3a56efeeda055ce3c85c9432f92b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
(2)描点并画出该函数的图象.
(3)根据函数图象可得:该的数的最大值为_____________;观察函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f21cb1a6bcc6e2482c420ddebeb9853e.png)
(4)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74582758d327ad4bf6950a6a2b31ecf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f21cb1a6bcc6e2482c420ddebeb9853e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457bca07560f57c6f9e8824aabf3039b.png)
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10 . 一次函数
(a为常数,且a≠0).
(1)若点(﹣1,3)在一次函数
的图像上,求a的值;
(2)若
,当
时,函数有最大值5,求出此时一次函数
的表达式;
(3)对于一次函数
(
),若对任意实数x,
都成立,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59f1422f5f203ff449ea33ec9a6cb91.png)
(1)若点(﹣1,3)在一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59f1422f5f203ff449ea33ec9a6cb91.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a12a30935c79ae769818043a496f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(3)对于一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba29023b95c9ee78185841cdaa726a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
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2022-09-03更新
|
179次组卷
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4卷引用:2021年浙江省杭州市滨江区江南实验学校中考数学三模试卷
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